How much does it cost to replace spark plugs on a Lexus IS250?
Typically, replacing the six spark plugs on a Lexus IS250 costs about $200–$500 at an independent shop, and $400–$900 at a dealership. If you do it yourself, parts usually run about $60–$180 depending on the plug type and brand.
Replacing spark plugs on a Lexus IS250 involves six plugs for the 2.5-liter V6 engine. The total price you see will hinge on where you go, what parts you choose, and how much labor the job requires. Below is a breakdown of typical pricing, factors that can change the final bill, and some DIY considerations to help you plan.
Cost overview
Prices vary by shop type and region. The following ranges reflect typical market pricing for a six-plug job on the IS250 as of 2025 in the United States.
- Independent repair shop: typically $200–$500 total (labor roughly 1.5–2.5 hours at $80–$120 per hour; plugs cost extra).
- Dealership/Lexus-certified shop: typically $400–$900 total (often higher labor rates and potential diagnostic checks).
- Do-it-yourself (parts only): typically $60–$180 for six plugs (depends on plug type and brand; you supply the labor).
In practice, labor rates are the biggest driver of cost. The exact price also depends on whether OEM or aftermarket plugs are used and whether any related components (such as coil packs or gaskets) need replacement during the service.
What influences the final price
Several factors commonly influence the final bill beyond the base cost of six plugs. The following list explains the main price drivers.
- Labor rates in your area: Urban or high-cost regions typically charge more per hour than rural areas.
- Plug type and brand: Iridium or platinum OEM-equivalent plugs cost more per plug but may last longer; copper or basic platinum plugs are cheaper upfront.
- Access and service steps: If coils, intake components, or other parts must be removed to reach the plugs, labor time increases.
- Additional parts or services: Coil packs, gaskets, or misfire diagnostics can add to the bill if problems are found or suspected.
- Vehicle condition and diagnostics: If the technician runs troubleshooting or codes prior to replacement, there may be diagnostic fees or extra labor.
Budget guidance: Expect the final price to reflect the complexity of access and the quality of parts chosen. Always request a written estimate that itemizes parts and labor before authorizing the work.
DIY considerations
Doing the job yourself can save money, but it requires the right tools and care. The IS250 uses a coil-on-plug setup, so you’ll replace six plugs with coils still in place, which can be straightforward or fiddly depending on your experience.
Tools and safety
- Basic hand tools (ratchets, sockets, extensions)
- Spark plug socket and torque wrench
- Dielectric grease and anti-seize compound (optional, depending on plug type)
- Replacement spark plugs (OE-recommended or equivalent)
- Safety gear: gloves and eye protection
Note: If you’re not comfortable with removing components or aligning spark plugs without cross-threading, it’s wiser to have a professional perform the replacement. Improper installation can cause engine damage or misfires.
Is it worth it?
For many owners, the decision comes down to time, skill level, and local labor rates. If you have the right tools, a steady hand, and you’re comfortable with basic automotive maintenance, a DIY plug change can bring the cost down to roughly the parts price. Otherwise, independent shops offer a middle ground between cost and risk, while dealers provide OEM parts and service at premium pricing.
Summary
Replacing spark plugs on a Lexus IS250 typically costs $200–$500 at independent shops and $400–$900 at dealerships, with parts-only DIY costs around $60–$180. The final price hinges on labor rates, plug type, access complexity, and any additional services required. If you’re unsure about the job, getting quotes from a few shops and reviewing the estimate detail can help prevent surprises. In most cases, six plugs will be replaced as a single service, potentially along with coil packs if wear or misfires are detected.
